689329749 has 8 divisors (see below), whose sum is σ = 919546560. Its totient is φ = 459333056.

The previous prime is 689329717. The next prime is 689329789. The reversal of 689329749 is 947923986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689329749 - 2⁵ = 689329717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689329789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47577 + ... + 60350.

It is an arithmetic number, because the mean of its divisors is an integer number (114943320).

Almost surely, 2^689329749 is an apocalyptic number.

It is an amenable number.

689329749 is a deficient number, since it is larger than the sum of its proper divisors (230216811).

689329749 is a wasteful number, since it uses less digits than its factorization.

689329749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110059.

The product of its digits is 5878656, while the sum is 57.

The square root of 689329749 is about 26255.0899636623. The cubic root of 689329749 is about 883.3693782689.

The spelling of 689329749 in words is "six hundred eighty-nine million, three hundred twenty-nine thousand, seven hundred forty-nine".